I am not related to your Drake Family. On the 1870 census of Essex Co., N.J. there were 2 Mahlon's. One was born 1839 and his wife was Harriet and a child Irving. The other Mahlon was much younger, born 1855 and his parents were Elias and Harriet , both born ca 1822. Possibly your Mahlon was one of these. Bob Eddings.